The Sunglo line of greenhouses feature a thermostatically-controlled ventilation system and aluminum bench framework. The double wall construction provides better temperature control than glass, allowing you to use it all year round, no matter where you live. The included automatic shutter system monitors outside temperature and adjusts to maintain the optimal climate for your plants. The construction of the Sunglo 1700 Lean-To Greenhouse Premium Package makes it exceptionally strong as its riveted aluminum frame, combined with heavy gauge DR acrylic Plexiglas, can bear up to 35 lbs. of snow per sq. ft. and wind gusts up to 80 mph. Pre-cut components make for easy assembly with standard hand tools.